:root {
  --bg-color: #f8f9fa;
  --card-bg: white;
  --shadow-color: rgba(0, 0, 0, 0.1);
}

.dark-mode {
  --bg-color: #1a1a1a;
  --card-bg: #2d2d2d;
  --shadow-color: rgba(0, 0, 0, 0.3);
}

body, html {
  background-color: var(--bg-color);
  height: 100%;
  margin: 0;
  font-family: 'Arial', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
}

.login-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--card-bg);
  padding: 40px 30px;
  border-radius: 10px;
  box-shadow: 0 10px 20px var(--shadow-color);
  text-align: center;
  max-width: 400px;
  width: 100%;
}

.login-card img {
  width: 80%;
  margin-bottom: 20px;
  border-radius: 8px;
}

.btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #007bff;
  border-color: #007bff;
  padding: 10px 20px;
  font-size: 16px;
  border-radius: 5px;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.btn-primary:hover {
  background-color: #0056b3;
  border-color: #004085;
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
}

.google-icon {
  font-size: 20px;
  margin-right: 10px;
}